Wordfence Intelligence Weekly WordPress Vulnerability Report (March 30, 2026 to April 5, 2026)

Last week, there were 56 vulnerabilities disclosed in 50 WordPress Plugins that have been added to the Wordfence Intelligence Vulnerability Database, and there were 38 Vulnerability Researchers that contributed to WordPress Security last week. Review those vulnerabilities in this report now to...

CVE-2026-39961 Aiven Operator has cross-namespace secret exfiltration via ClickhouseUser connInfoSecretSource

Aiven Operator allows you to provision and manage Aiven Services from your Kubernetes cluster. From 0.31.0 to before 0.37.0, a developer with create permission on ClickhouseUser CRDs in their own namespace can exfiltrate secrets from any other namespace — production database credentials, API keys...

CVE-2026-39961

CVE-2026-39961 (Aiven Operator) affects Aiven Operator versions 0.31.0–0.36.x. A developer with create permission on ClickhouseUser CRDs in their own namespace can exfiltrate secrets from any namespace. The operator reads the victim’s secret using its ClusterRole (aiven-operator-role) and writes ...

EUVD-2026-20880

Mattermost Plugins versions =2.3.1 fail to limit the request body size on the /lifecycle webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610...

EUVD-2026-20882

Mattermost Plugins versions =2.1.3.0 fail to limit the request body size on the /changes webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the /changes webhook endpoint. An attacker can exhaust system memory by sending an oversized JSON payload. Remediation Upgrade github.com/mattermost/mattermost-plugin-msteams/serv...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the /lifecycle webhook endpoint. An attacker can exhaust system memory and disrupt service availability by sending an oversized JSON payload. Remediation Upgrade...

Mattermost MS Teams plugin doesn't limit the request body size on the /lifecycle webhook endpoint

Mattermost Plugins versions =2.3.1 fail to limit the request body size on the /lifecycle webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610...

Mattermost MS Teams plugin doesn't limit the request body size on the /changes webhook endpoint

Mattermost Plugins versions =2.1.3.0 fail to limit the request body size on the /changes webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611...

CVE-2026-24661

Mattermost Plugins versions =2.1.3.0 fail to limit the request body size on the /changes webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611...

CVE-2026-21388

Mattermost Plugins versions =2.3.1 fail to limit the request body size on the /lifecycle webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610...

CVE-2026-24661 Unbounded Request Body Read in MS Teams Plugin {{/changes}} Webhook Endpoint

Mattermost Plugins versions =2.1.3.0 fail to limit the request body size on the /changes webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611...

CVE-2026-24661 Unbounded Request Body Read in MS Teams Plugin {{/changes}} Webhook Endpoint

Mattermost Plugins versions =2.1.3.0 fail to limit the request body size on the /changes webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611...

CVE-2026-24661

Mattermost Plugins

CVE-2026-21388 Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}} Webhook Endpoint

Mattermost Plugins versions =2.3.1 fail to limit the request body size on the /lifecycle webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610...

CVE-2026-21388 Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}} Webhook Endpoint

Mattermost Plugins versions =2.3.1 fail to limit the request body size on the /lifecycle webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610...

CVE-2026-21388

Mattermost Plugins versions =2.3.1 fail to limit the request body size on the /lifecycle webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610...

CLEANSTART-2026-BY59711 gRPC-Go is the Go language implementation of gRPC

Multiple security vulnerabilities affect the cert-manager-webhook-pdns-fips package. gRPC-Go is the Go language implementation of gRPC. See references for individual vulnerability details...

PT-2026-31604

Name of the Vulnerable Software and Affected Versions Mattermost Plugins versions less than or equal to 2.1.3.0 Description Mattermost Plugins versions less than or equal to 2.1.3.0 do not limit the request body size on the /changes webhook endpoint. This allows an authenticated attacker to cause...

PT-2026-31603

Mattermost Plugins versions =2.3.1 fail to limit the request body size on the /lifecycle webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610...